Datalogics Knowledge Base

Why are we getting dark pages, patterns and grid lines when compressing a scanned document?

Apr 30, 2025 APDFL, Adobe PDF Library, dark pages, patterns, grid lines, scanned, render 0 0 0/5 (0 Vote)

If the input document was originally rendered with no smoothing or antialiasing of any kind, you are essentially starting with a lot of glyphs that all have extremely rough edges, being rendered with nothing but black or white squares. If this is... Read More

Troubleshooting Rendering Issues with Large PDF Files in APDFL 18

Sep 24, 2025 PDF rendering issues, APDFL 18, large PDF rasterization, PDPageDrawContentsToMemoryWithParams, TIFF viewer compatibility, overprint preview, memory usage 0 0 0/5 (0 Vote)

Overview Rendering a large PDF page at high resolution with Adobe PDF Library 18 can create a multi-gigabyte raster image. Users may experience long processing times, high memory consumption, application failures on memory-constrained systems, or... Read More

"Warning: This form is not supported with the current version of Acrobat or Acrobat Reader" when dynamic XFA PDF form is rendered

Apr 30, 2025 APDFL, Adobe PDF Library, render, dynamicXFA 0 1 3/5 (1 Vote)

Dynamic XFA PDF forms contain backup placeholder content in addition to the XFA data describing the fields and content of the form. The placeholder content can vary but is typically a warning to upgrade or use Adobe Reader. When a dynamic XFA PDF... Read More

Can the user render the objects in a PDF document in a particular order?

Apr 30, 2025 APDFL, Adobe PDF Library, render, graphics, vector image, PDDrawCosObjToWindow 0 0 0/5 (0 Vote)

You can draw objects from a PDF document to a window in a specific order. You could draw out of the text stream first, then a graphic, and then a vector image. For example, you might want to render the text objects in a PDF document, and leave out... Read More